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Modelling of rocking structures in a centrifuge
| Content Provider | Scilit |
|---|---|
| Author | Pelekis, I. Madabhushi, G. S. P. DeJong, M. J. |
| Copyright Year | 2018 |
| Description | Structural rocking and foundation rocking are two design strategies to provide seismic base isolation. Two building models designed to exhibit each rocking behaviour respectively, were tested simultaneously in a centrifuge under earthquake loading. The instrumentation, detailed in this paper, allowed soil and structural deformations to be derived from measured accelerations, and the force demand of the superstructure (e.g. storey drift) to be derived from measured strains and accelerations. Importantly, these measurements enabled direct comparison of the two rocking systems, quantifying relative benefits. In selected earthquakes, foundation rocking caused larger dynamic differential settlements while structural rocking led to larger rocking rotations. Structural rocking and foundation rocking are two design strategies to provide seismic base isolation. Two building models designed to exhibit each rocking behaviour respectively, were tested simultaneously in a centrifuge under earthquake loading. The soil-structure interaction of two building models with different footing-column connections was investigated with reference to low frequency input motions in a centrifuge. Centrifuge modelling has become increasingly popular for replicating soil-structure interaction during dynamic events. The chapter presents response parameters from specific earthquake centrifuge tests on soil-building systems, obtained by using MEMS and piezoelectric accelerometers for building and soil deformations, respectively, and strain gauges for axially loaded members. Structural rocking led to larger rocking rotations and interstorey deformations, with these response parameters being similar across loose and dense sand tests. Foundation rocking led to smaller rocking rotations and interstorey deformations as opposed to structural rocking, and even smaller in loose sand. Book Name: Physical Modelling in Geotechnics |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2018-0-86959-9&isbn=9780429438660&doi=10.1201/9780429438660-62&format=pdf |
| Ending Page | 442 |
| Page Count | 6 |
| Starting Page | 437 |
| DOI | 10.1201/9780429438660-62 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Physical Modelling in Geotechnics Geological Engineering Structural Building Rocking Centrifuge Loading Design Strategies Tested Simultaneously Models Designed Base Isolation |
| Content Type | Text |
| Resource Type | Chapter |
